12788609 has 2 divisors, whose sum is σ = 12788610. Its totient is φ = 12788608.

The previous prime is 12788603. The next prime is 12788617. The reversal of 12788609 is 90688721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6553600 + 6235009 = 2560^2 + 2497^2 .

It is a cyclic number.

It is not a de Polignac number, because 12788609 - 2⁴ = 12788593 is a prime.

It is not a weakly prime, because it can be changed into another prime (12788603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6394304 + 6394305.

It is an arithmetic number, because the mean of its divisors is an integer number (6394305).

Almost surely, 2^12788609 is an apocalyptic number.

It is an amenable number.

12788609 is a deficient number, since it is larger than the sum of its proper divisors (1).

12788609 is an equidigital number, since it uses as much as digits as its factorization.

12788609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 12788609 is about 3576.1164690205. The cubic root of 12788609 is about 233.8520078668.

The spelling of 12788609 in words is "twelve million, seven hundred eighty-eight thousand, six hundred nine".